Split pulley



(No Model.)

D. ARGERBRIGHT. SPLIT PULLEY.

No. 414,480. Patented Nov. 6, 1889.

Fay/Z.

q hbvmooeo anaemic;

33);; k attorney UNITED I STATES PATENT EEioE.

DANIEL ARGERBRIGHT, OF TROY, OHIO.

SPLIT PU LLEY.

SPEOIFIOATiON forming part of Letters Patent No. 414,480, dated November 5, 1889.

Application filed January 26,1889. Serial No. 297,679- (llo model.)

To all whom it may concern.-

Be it known that I, DANIEL ARGERBRIGHT, a citizen of the United States, and aresident of Troy, in the coun tyof Miami and State of Ohio, have invented certain new and useful Improvements in Divided Pulleys; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable'ot-hers skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

Figure 1 of the drawings is a partial verti cal sectional view of the pulley.

Fig. 2 is an edge view. Fig. 3 illustrates a detail view of a hub-section.

This invention has relation to improvements in divided pulleys; and it consists in thenovel construction and combination of parts, all as hereinafter set forth.

In the accompanying drawings, the letter A designates the wooden rim of the pulley, consisting of the semicircular sections A A. In connection with each section is provided a chord-brace B, or each section may have two such chord-braces arranged side by side and parallel to each other. These chord-braces serve to sustain the ends of the ri1n-sections and hold said sections to their form, and they also serve to hold the hub-sections G in proper position. Each hub-section consists of the castingl) and the cap-plate E. In some cases,.

especially when gas-pipe is employed in providing the chord-braces the casting D is grooved on its outer face to receive the braces, as indicated at a, and the cap-plate may also be correspondingly grooved. In large pulleys it may bev advisable to provide lateral extensions b b of the hub-casting and cap-plate to provide additional bearing-surface for the shaft, said extensions being formed with perforations to receive the fastening-bolts c. In small pulleys the hub-sections and cap-plates can be secured together by bolts 0, passing through openings in the middle portions of said hub-sections and cap-plates, as shown. Each hub-section is castwith a projection (Z, extending toward the other hub-section and formed with a channel-bearing 6, adapted to form one half of the entire bearing for the shaft, the channel-bearing in the other hubsection forming the other half.

Z Z indicate the hub-bolts, which extend through hearings n in the hub-sections and secure the latter together.

Parallel to the plane sides of the projections (1 are the lug-flanges f, which extend from the hub-casting and are placed sufficiently distant from the projections d to provide the intervals 5 for the reception of the setting-plates h, in which are formed threaded perforations for the set-screws 7a, which pass between the hub-sections, or in the plane of division of the sectional. pulley, as shown. When the set-screws are worked up against the shaft, the setting-plates are pressed back against the lug-flanges f, so that the clampingbolts which hold the hub-sections together are. not additionally strained on account of this fastening andthere is no tendency to force the hearings from the shaft. The lugs f are made long enough to engage the ends of the setting-plates when the hub sections or boxes are adjusted on the largest shafting, so in that way enough is provided for said setting-plates when the sections are to be secured to shafts of smaller diameter. The hubsections are also adjustable by means of interposed layers or plates Z- between the hubs'ections and chord-bars, so that they may be brought in true relation to the axis of the shafting. Instead of using adj Listing-layers on the outer surface of the h rib-sections, bushinglayers may be provided in the hub-sections in any convenient way; but I prefer to glue layers of sand-paper upon each other in the hub-sections until the opening between said sections is reduced to the proper size.

The ends of the chord-braces are preferably dovetailed, as at i, into the wood of the rimsections, so as to prevent them from being displaced; or they may be fastened to flanged socket-plates B, which have a curvature corresponding to that of the rim-sections, and which are secured to said rim-sections by screw-bolts. These flanged socket-plates are especially useful in supporting the rims of broad pulleys. The rim-sections of these pulleys are usually built up of narrow curved are pieces of wood, which are glued to each other until a belt-surface of the proper breadth is provided, and in order to strengthen the rimsections and to prevent the pulley from separating underhigh speed tie-rods are provided,

which are preferably so arranged that a con-.

the mortise-sockets of the rim-sections of the form shown, and when the ends of the braces are seated therein to secure the latter by splitting the ends and inserting wedges, which may be fastened by glue.

Having described this invention, what I claim, and desire to secure by Letters Patent, 1s

1. In a divided pulley, the combination, with the hub-sections and the bolt-connections, of the setting-plates and set-screws extending in the plane of division of the pulley-sections, substantially as specified.

2. A divided Wood pulley consisting of two semicircular rim-sections having chord-braces supporting hub sections and cap plates clamped thereon, tie-rods connecting the cliordbraces, bolts connecting the hub-sections, the setting-plates, and the set-screws extending through said plates in the plane of division between the sections, substantially as specified.

In testimony whereof I aflix my signature in presence of two witnesses.

DANIEL ARGERBRIGHT.

WVitnesses:

AUG. 0. MILL, J. M 000K. 

